User blog comment:Dante-Must-Die-Mode/What The Heaven And Hell?: Nero/@comment-967403-20150329222022/@comment-967403-20150329234236

Yamato is described as a "dark forged" sword, meaning it was created since "forged" implies that and Sparda gave it to Vergil. And there may be more to the sword then Vergil  but there's no denying it was also Vergil trademark weapon and he had a connection to the blade himself (He can at least channel his own power into it) . Rebellion is almost the same way. Also a keepsake from Sparda. But we're not saying that isn't connected to Dante cause even the game details it serves as his physical manifestation of power and awaken by his blood, despite existing before him. They're magical blades. It's not hard to surmise that they can have unique connections to it.

And I mentioned he does exhibit traits from Vergil and Sparda. I forgot to mention Dante too but the parallels are stil there for all, including Vergil. We know he's not either Sparda (because he's dead.) or Dante (since there's no hints on that). But you have various sources saying so that's always has something to it that doesn't make it "official" and then you have story parallels for it.

Seeing as Nero is a relative (even If you deny Vergil being his daddy) and fixed it by calling upon it, it confirms someone in their family has the capability of fixing it.